feat(web): 区域发病统计图表与蚕房区域字段（#22）

web/src/dal/silkworm.ts

@@ -5,6 +5,7 @@ export interface SilkwormHouse {
   name: string;
   code?: string;
   location?: string;
+  region?: string;
   description?: string;
   status?: 'active' | 'inactive' | 'running' | 'idle' | 'alarm';
   capacity?: number;

web/src/dal/trace.ts

@@ -36,3 +36,12 @@ export const getTraceChecklist = (id: string) =>
   get<ChecklistItem[]>(`/trace-records/${id}/checklist`);
 export const submitTraceChecklist = (id: string, answers: { key: string; answer: string }[]) =>
   post<TraceRecord>(`/trace-records/${id}/checklist`, { answers });
+
+export interface RegionStat {
+  region: string;
+  total: number;
+  diseases: Record<string, number>;
+}
+
+export const getRegionStats = (days = 90, disease?: string) =>
+  get<RegionStat[]>('/trace-records/region-stats', { params: { days, disease } });

web/src/pages/Silkworm.tsx

@@ -13,6 +13,7 @@ export default function SilkwormPage() {
     { title: '序号', valueType: 'indexBorder', search: false, width: 60 },
     { title: '名称', dataIndex: 'name' },
     { title: '位置', dataIndex: 'location', search: false, render: (_, r) => r.location || '-' },
+    { title: '区域', dataIndex: 'region', search: false, render: (_, r) => r.region || '-' },
     { title: '容量(盒)', dataIndex: 'capacity', search: false, render: (_, r) => r.capacity ?? '-' },
     {
       title: '阶段',
@@ -111,6 +112,9 @@ export default function SilkwormPage() {
           <Form.Item label="位置" name="location" rules={[{ required: true, message: '请输入位置' }]}>
             <Input placeholder="如：1号厂房东侧" />
           </Form.Item>
+          <Form.Item label="区域" name="region">
+            <Input placeholder="如：XX镇 / XX村（用于区域发病统计）" />
+          </Form.Item>
           <Form.Item label="容量(盒)" name="capacity" rules={[{ required: true, message: '请输入容量' }]}>
             <Input type="number" min={0} placeholder="蚕盒数量" />
           </Form.Item>

web/src/pages/Traces.tsx

@@ -1,9 +1,10 @@
-import { useRef, useState } from 'react';
+import { useEffect, useRef, useState } from 'react';
 import {
   Button, Drawer, Form, Input, Modal, Popconfirm, Radio, Select, Space, Tag, Typography, message,
 } from 'antd';
 import { PlusOutlined } from '@ant-design/icons';
 import { ProTable, type ActionType, type ProColumns } from '@ant-design/pro-components';
+import ReactECharts from 'echarts-for-react';
 import dayjs from 'dayjs';
 import {
   listTraceRecords,
@@ -13,8 +14,10 @@ import {
   autoTrace,
   getTraceChecklist,
   submitTraceChecklist,
+  getRegionStats,
   type TraceRecord,
   type ChecklistItem,
+  type RegionStat,
 } from '../dal/trace';
 import { authService } from '../services/auth';
 
@@ -28,6 +31,7 @@ const STATUS_LABELS: Record<string, { color: string; text: string }> = {
 const canWrite = () => authService.hasPermission('trace:write');
 
 export default function TracesPage() {
+  const [regionStats, setRegionStats] = useState<RegionStat[]>([]);
   const actionRef = useRef<ActionType>();
   const [createOpen, setCreateOpen] = useState(false);
   const [createForm] = Form.useForm<Partial<TraceRecord>>();
@@ -35,6 +39,38 @@ export default function TracesPage() {
   const [checklist, setChecklist] = useState<ChecklistItem[]>([]);
   const [answers, setAnswers] = useState<Record<string, string>>({});
 
+  useEffect(() => {
+    getRegionStats(90)
+      .then(setRegionStats)
+      .catch(() => {});
+  }, []);
+
+  const barOption = {
+    title: { text: '区域发病统计（近 90 天）' },
+    tooltip: {},
+    xAxis: { type: 'category', data: regionStats.map((s) => s.region) },
+    yAxis: { type: 'value', minInterval: 1 },
+    series: [{ type: 'bar', data: regionStats.map((s) => s.total), itemStyle: { color: '#fa8c16' } }],
+  };
+
+  const diseaseMap: Record<string, number> = {};
+  regionStats.forEach((s) => {
+    Object.entries(s.diseases).forEach(([d, n]) => {
+      diseaseMap[d] = (diseaseMap[d] || 0) + n;
+    });
+  });
+  const pieOption = {
+    title: { text: '病种分布' },
+    tooltip: { trigger: 'item' },
+    series: [
+      {
+        type: 'pie',
+        radius: ['35%', '65%'],
+        data: Object.entries(diseaseMap).map(([name, value]) => ({ name, value })),
+      },
+    ],
+  };
+
   const openDetail = async (r: TraceRecord) => {
     setDetail(r);
     if (r.status !== 'archived') {
@@ -116,6 +152,16 @@ export default function TracesPage() {
 
   return (
     <>
+      {regionStats.length > 0 ? (
+        <div style={{ display: 'flex', gap: 16, marginBottom: 16 }}>
+          <div style={{ flex: 2, background: '#fff', borderRadius: 8, padding: 8 }}>
+            <ReactECharts option={barOption} style={{ height: 260 }} />
+          </div>
+          <div style={{ flex: 1, background: '#fff', borderRadius: 8, padding: 8 }}>
+            <ReactECharts option={pieOption} style={{ height: 260 }} />
+          </div>
+        </div>
+      ) : null}
       <ProTable<TraceRecord>
         actionRef={actionRef}
         rowKey="id"